A city-destroyingly awesome idea Urban (I am a huge fan of the Far Side and do not remember this one, so if others cannot produce some linkage evidence i suggest they give it a rest)! Love the concept, the execution is pretty good, and dig it the most on the bottom of the tee. But i agree with the sign type, plus i think one of those monty python-esque hands would be better pointing instead of the arrow. Still a 4$ for the rampaging good times depicted here!

FWIW, there is a Far Side comic with this exact text and featuring a too-short monster; however, it does not have the second, tall monster.

The only option for more concrete evidence is, unfortunately, a physical search through Larson's complete collection (4000+ cartoons, mind you), since according to Wikipedia: "It is difficult to find many Far Side cartoons online, since Larson (and/or his publishers and lawyers) has been very effective at persuading people to not infringe on his copyright. There is a widely distributed letter online, attributed to Gary Larson, in which he explains the "emotional cost" to him of people displaying his cartoons on their websites, and asks them to stop doing so."

I'm not sure about this whole farside thing, but given UrbanRaptors past on this site - his 'oh my Godzilla' contest, previous designs, and even his name, i think its safe to assume, that giant monsters attacking cities is never far from his mind.

I reckon, he's thought of this idea and just been completly unaware of the far side one.

read evilstan's comment, he explained why you can't post it. if that doesn't satisfy you go here http://www.portmann.com/farside/home.html. then i would suggest getting your hands on some farside books, even if you don't find that specific one, its worth it.